Question

An electron is initially at rest in a uniform electric field having a strength of 2.2 x 10^6 V/m. It is then released and accelerated by the presence of the electric field.

Part (a) What is the change in the electron's kinetic energy, in kilo electron volts, if it travels over a distance of 0.475 m in this field? Numeric: A numeric value is expected and not an expression.

Part (b) Over how many kilometers would it have to be accelerated in the same electric field to increase its kinetic energy by 45 GeV? Numeric: A numeric value is expected and not an expression.